on our 1982 Ford F100 Pickup, Never seen this one before... So Whatin the world can make a motor increase acceleration , instead of decreased acceleration when i removed a spark plug wire upon testing ?
Not sure which engine you have, but all are carb as far as I can tell.
Most have either a mechanical (vaccuum) or electronic altitude/idle speed throttle compensation system. It stands to reason that this system would compensate for the drop in idle speed due to disabling one cylinder.